I share the same feelings and "problems". I think the as built NAS is a way to noisy. I remplace the builtin YSTECH by a noctua NF-S12A. I had to cut the little piece of plastic on the NOctua 4pins to connect it on the mother board of the NAS.
Apparently it run good - BUT !!!!! max at 370RPM…
I checked if it was correctly plugged in: normally YES
I put in the ADM energy settings at MAX, still running at 350RPM…
Do you know or think that the firmware is limited to the YSTECH fan only ?
